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Related Experiment Videos

Circulating intercellular adhesion molecule-1 in patients with systemic sclerosis

P P Sfikakis1, J Tesar, H Baraf

  • 1Department of Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814.

Clinical Immunology and Immunopathology
|July 1, 1993
PubMed
Summary
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Circulating soluble intercellular adhesion molecule-1 (s-ICAM-1) levels are elevated in systemic sclerosis (SSc) patients, particularly those with diffuse disease and digital ulcers. These findings suggest s-ICAM-1 may indicate endothelial activation in SSc.

Area of Science:

  • Immunology
  • Rheumatology
  • Dermatology

Background:

  • Increased expression of intercellular adhesion molecule-1 (ICAM-1) observed in SSc skin.
  • Investigating soluble ICAM-1 (s-ICAM-1) as a potential biomarker in systemic sclerosis (SSc).

Purpose of the Study:

  • To determine if circulating s-ICAM-1 levels are elevated in SSc patients.
  • To compare s-ICAM-1 levels in SSc with systemic lupus erythematosus (SLE).
  • To explore the association between s-ICAM-1 and soluble IL-2 receptor (s-IL 2R) as a marker of lymphocyte activation.

Main Methods:

  • Quantified serum s-ICAM-1 levels in SSc patients and healthy controls.
  • Compared s-ICAM-1 levels between SSc, SLE, and control groups.
  • Assessed correlation between s-ICAM-1 and s-IL 2R, disease severity, and clinical manifestations like digital ulcers.

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Main Results:

  • SSc patients exhibited significantly higher s-ICAM-1 levels compared to controls (587 vs. 373 ng/ml).
  • Elevated s-ICAM-1 levels were most pronounced in patients with diffuse, rapidly progressive SSc.
  • Patients with digital ulcers showed significantly increased s-ICAM-1, but not s-IL 2R, levels. No correlation was found between s-ICAM-1 and s-IL 2R.

Conclusions:

  • Circulating s-ICAM-1 may serve as a valuable indicator of endothelial activation in systemic sclerosis.
  • Further research is warranted to elucidate the precise role of ICAM-1 in SSc pathogenesis.
  • s-ICAM-1 levels correlate with specific SSc complications like digital ulcers.